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Apparatus for remotely testing telephone subsets

  • US 3,407,274 A
  • Filed: 12/30/1965
  • Issued: 10/22/1968
  • Est. Priority Date: 12/30/1965
  • Status: Expired due to Term
First Claim
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11. IN A TELEPHONE SYSTEM, A PLURALITY OF TELEPHONE SUBSETS, SAID SUBSETS INCLUDING DIFFERENT TYPES OF CALLING DEVICES EACH OPERABLE TO GENERATE DIGIT SIGNALS, APPARATUS FOR TESTING THE OPERATION OF SAID CALLING DEVICES, MEANS FOR SEIZING SAID APPARATUS BY DIALING FROM A CALLING ONE OF SAID SUBSETS AN ACCESS CODE COMPRISING A PLURALITY OF SAID DIGITS, AT LEAST A NUMBER OF SAID LAST-MENTIONED DIGITS

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